Get a List of all files and subfolders from a directory with Java

getAllFilenamesAndDirectoriesSorted

  public List<String> getAllFilenamesAndDirectoriesSorted(String pathToDir) {
    Path start = Paths.get(pathToDir);
    try (Stream<Path> stream = Files.walk(start, Integer.MAX_VALUE)) {
      return stream.map(String::valueOf).sorted().collect(Collectors.toList());
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }